Rotary engine, pump, and the like



Febh 13, 1923.

J. ROBERTSON. ROTARY ENGINE,

PUMP, AND THE LIKE.

FILED MAR. 25, 1920.

I hatcnte l a L nut-4 JAMES RDBEETSON, OF STBEMTFOBD, LQNDON, ENGLAND.

ROTARY ENGINE, PUBKP, AND THE LIKE Application filed March 25, 1920.

To all 711710771 may cont-cm Be it known that I, lures Ronni: N. a subject of the King of Great Briunn. siding at Marsh Gate Engineering: Works. Marsh Gate Lane, tiltratlord, liondoi iling land have invented new and use't'ul lin- PTOVGRUOIltS in llotary Engines, Pumps, and the like ot which the lollowing is a specification. i i

My invention relates to rotary engines pumps and the like oi the lined abutment and sliding vane type,

In an engine constructed according to the invention, the rotor is mounted ei'centrii-ally within the casing}; in the usual. way. and the motive fluid is supplied axially to the rotor into passages all of which curve backwardlyn that is to say, against the d rection of rotation. and also expand in width as they pass from the centre to the periphery of the said rotor. The rotor is furnished laterally with radial projections which form radial recesses with portions of the rotor for receiving lugs upon the sliding vanes. The said recesses form a driving engagement between the parts and at the same time permit of the necessary radial movement of the vanes.

Rotary engines and pumps of the above type have before been proposed wherein the motive fluid is supplied axially to the rotor into passages which curve backwards. Others have been provided with radial outwardly expanding passages, and others with two sets of passages, one set being curved backwards and the other set expanding.

As will be understood, the above description applies rnutatis niutandis to a ro 'tary pump or blower.

To enable the invention to be fully understood. T will describe the same by reference to the accompanying drawintn in which,

Figure l. is a sectional side view of a rotary engine constructed according to the invention.

Figure 2 is a sectional plan view thereo't,

Figure 3 is a section on the line 3-3 Figure 1.

Figure l is a sectional side view of the rotor detached.

Figure 5 is a plan view thereof.

Figure 6 is a side view of one of the sliding vanes detached, and

Figure 7 is a plan View thereof.

a indicates the casing of the engine and Z) the rotor which is eccentrically mounted within the casing a uponthe shaft 0 which Serial No. 368,556.

is rotatably carried in bearings r] in the said casing. a is the inlet and f the outlet for the motive fluid, each of which is in the torn) oi a curved slot and registers in turn with axial passages having radial portioni-s 7L- and formed in the body ot the rotor. These passages 72. as above described, all curve hiu-hwards or against the direction oi rotation of the rotor 7, which is indicated by the arrow 2', and also increase in width as they pass from the centrh towards the periphery of the rotor.

j indicates the sliding vanes and 7, the lugs provided thereon. Z shows the lateral radial projections on the rotor between which and ribs we. thereon recesses are formed for receiving the lugs Z on the vanes j to form adriving engagement and at the same time permit of the necessary radial movement between these two parts. The vanes are maintained in contact with the inner peripheral face of the casing a by contrifugal force.

The vanes in the construction illustrated have the face, which contacts with the inner periphery of the casing a, recessed as indicated at a and the recessed portion is placed in communication with the interior of the casing by means of the hole 0.

The working spaces n comprised between each pair of sliding vanes are filled, when at their minimum capacity (shown at the right hand of Figure 1), with a suitable oil. such as a mineral oil.

The operation of the engine is as 'tollows, that is to say, the motive fluid enters through the inlet 0 and flows through the axial passage (7 into the radial passage 7/ at the moment in coinnninication therewith and thence enters the working space into which the said passage opens. and by its expansion in the said space drives the rotor in the direction of. the arrow 5in the usual way. its the rotor rotates the working space is brought into communication with the outlet through which the motive 'l'luid discharges. The centrifugal force generated by the revolvingrotor drives the oil contained in each working; space 7; outwards to the periphery of the said space so that the inner surface of the oil layer forms the outer boundary of each effective working space and, as the oil fills the space when the latter is of minimum capacity, that is to say when it is in communication with the outlet passage as shown on the right hand lira! of Figure 1, the whole of the motive fluid. is discharged.

As above described the oil in the working spaces 77 fills the recesses m in the sliding vanes 7' through the holes 0 and therel'iy forms cushions between the said vanes and the inner periphery of the casing a and so as to reduce the friction hetweenthese surfaces and thus increase the efiicienq oi the engine.

Although the invention hashecn particularly described applied to a rotary engine, it will he understood that it is equally applicable to rotary pumps and blowers] Clain'is:

1. A rotary engine, pump or the like oi the type referred to having a rotor provided with radial outwardl expanding passages which are curved haekwardly with respect to the direction of rotation of the rotor and the inner ends of which coin municate with axial inlet and outlet passages for the motive fluid, said rotor heing provided with recesses, sliding VflUUSWVlUCi'l venter said recesses in the rotor and are eccentrically mounted in said casing upon a shaft mounted insaid hearings, said rotor being; provided with radial outwardly of paneling passages which are curved hackwardly with respect to the direction of rotation of the'rotor, and the inner ends of which communicate "with axial inlet and outlet passages for the motiveflui'd sliding vanes, which enter saidrecesses in. the rotor and are furnished with lugs which engage radial projections on the rotor, and spaces between the pairs of vanes which are adapted to be fitted with a suitable oil to form a cushion between said vanes.

JAMES ROPERTSON. 

